(Solved): High School Graduation Gifts A random survey of 24 couples who had children graduating from high sc ...

High School Graduation Gifts A random survey of 24 couples who had children graduating from high school found that they spent an average of $138.21 on graduation gifts. The standard deviation of the sample is $6.90. Find the 95% confidence interval for the mean amount of money couples spent for graduation gifts. Round intermediate calculations to three decimal places, and final answers to two decimal places.